12 posts categorized "Embodied energy"

Electric motors and batteries have improved substantially over the past one hundred years, but today's much hyped electric cars have a range that is - at best - comparable to that of their predecessors at the beginning of the 20th century. Weight, comfort, speed and performance have eaten up any real progress. We don't need better batteries, we need better cars.

The power consumption of our high-tech machines and devices is hugely underestimated.

When we talk about energy consumption, all attention goes to the electricity use of a device or a machine while in operation. A 30 watt laptop is considered more energy efficient than a 300 watt refrigerator. This may sound logical, but this kind of comparisons does not make much sense if you don't also consider the energy that was required to manufacture the devices you compare. This is especially true for high-tech products, which are produced by means of extremely material- and energy-intensive manufacturing processes. How much energy do our high-tech gadgets really consume?

New research shows, albeit unintentional, that generating electricity with solar panels can also be a very bad idea. In some cases, producing electricity by solar panels releases more greenhouse gases than producing electricity by gas or even coal.

The high energy consumption of the mobile phone network is mainly due to the limited life span of the phones.

This week, more than 50,000 people gather in Barcelona for the ‘Mobile World Congress’, the annual high mass for the mobile telephone. They gape in admiration at the newest generation of gadgets, which is again fitted with new applications and new designs. This almost unanimously praised innovation, however, has a dark side. Around half of the energy use of the mobile phone network is attributed to the production of the phones.

Energy hungry America teaches the world how to build ecological houses.

A dirt cheap and 100 percent ecological house that has all the comforts of an ordinary home, without being connected to the electricity grid, waterworks, sewer system or the natural gas network. It does exist, but in most countries, building one is not allowed.

An Earthship is a completely self-sufficient house that has a natural temperature regulation, without the use of a heating system. The building also generates its own electricity, collects and filters its own drinking water and cleans its own effluent water. The house is partly buried into the earth and is constructed mainly with waste materials; car tyres, aluminium cans and glass bottles. This low-tech building approach is ecologically as well as economically advantageous.

This autumn, the British coastal city of Brighton approved the construction of 16 Earthships. It’s the first time that a European city council has given builders the green light to mass construct this radical ecological housing form. In the United States nearly one thousand Earthships have been built, most of them in the desert of New Mexico. (Pictures: Michael Reynolds)